Sure. I work in game dev, we work with highly NDAd stuff that a lot of people would love to know about(things like console devkits way before anything about the hardware is made public, or just details on unannounced games). The temptation to "be the hero" as you said is always there but it would literally cost you your job and most likely your entire career as I can't imagine you'd ever find employment after doing such a thing. It's really hard to resist when you read comments and someone says "oh I bet Sony would never do X in their next console" and you actually know the truth but can't say.